I think it may be tradition to include them as well. The things are largely decorative, so you can live without them pretty easily. I know I do. Stand up an play, then tell me whether you need the things. I mean, if you need a marker to find the first fret, you've got a lot more problems than how the things are marked. Side markers are all you need for practical purposes unless you wanna decorate. At that point, all bets are off.